ELECTROLYTIC CONDUCTANCE IN HYDROGEN PEROXIDE–WATER MIXTURES: PART I. THE ALKALI CHLORIDES

1958 ◽  
Vol 36 (3) ◽  
pp. 449-455 ◽  
Author(s):  
D. K. Thomas ◽  
O. Maass
Keyword(s):  
Hydrogen Peroxide ◽  
Direct Current ◽  
Current Method ◽  
Solvent Composition ◽  
Electrolytic Conductance ◽  
Equivalent Conductance ◽  
Alkali Chlorides ◽  
Water Hydrogen

The equivalent conductance of a series of alkali chlorides has been measured in water–hydrogen peroxide mixtures over the whole range of solvent composition. The measurements were made by a simple direct-current method, and the results obtained are interpreted in terms of the viscosity of the solvent.

ELECTROLYTIC CONDUCTANCE IN HYDROGEN PEROXIDE – WATER MIXTURES: PART II. SOME MONOBASIC AND DIBASIC ACIDS

1958 ◽  
Vol 36 (5) ◽  
pp. 744-749 ◽  
Author(s):  
D. K. Thomas ◽  
O. Maass
Keyword(s):  
Hydrogen Peroxide ◽  
Marked Decrease ◽  
Current Method ◽  
Strong Acid ◽  
Weak Acid ◽  
Electrolytic Conductance ◽  
Degrees Of Dissociation ◽  
System Water ◽  
Water Hydrogen ◽  
Made In

Measurements of the equivalent conductance of sulphuric, nitric, and hydrofluoric acids were made in water – hydrogen peroxide mixtures by means of a direct-current method. It was found that in solvents containing a high percentage of hydrogen peroxide the conductivities of these acids were extremely low, and it is proposed that this results from a marked decrease in their degrees of dissociation. This proposal is supported by similar measurements made on the system water – strong acid – weak acid.

A MODIFICATION OF THE DIRECT CURRENT CONDUCTANCE METHOD

1958 ◽  
Vol 36 (2) ◽  
pp. 315-320 ◽  
Author(s):  
G. D. Graham ◽  
O. Maass
Keyword(s):  
Hydrogen Peroxide ◽  
Direct Current ◽  
Current Method ◽  
Alternating Current ◽  
Aqua Regia ◽  
Conductance Method ◽  
Current Conductance

A modification in the employment of the direct current method of measuring conductivities is described. The main objective is that pure metallic probe and current carrying electrodes can be used, thus making it possible to investigate the conductivity of solutions such as hydrogen peroxide, aqua regia, etc. This necessitates a choice of electrodes which are inert to such solutions. An electrometer having an infinite resistance so as to avoid any polarization at the probes, in this case the quadrant electrometer, is described in its use as a null instrument. An accuracy as high as or greater than that of the alternating current method could be obtained. Furthermore, this method entails greater equipment economy and simplicity in apparatus required.

Determination of Dipole Spacing in Electrical Landfill Leakage Detection

2010 ◽  
Vol 171-172 ◽  
pp. 171-174
Author(s):  
Hong Cheng ◽  
Peng Kun Liu ◽  
Yu Ling Wang ◽  
Chang Xin Nai
Keyword(s):  
High Voltage ◽  
Direct Current ◽  
Current Method ◽  
Leakage Detection ◽  
High Voltage Direct Current ◽  
The Impact

The dipole spacing can directly affects the detecting sensitivity and accuracy in the landfill leakage detection by the high voltage direct current method. Based on the high voltage DC detecting model, the impact of dipole spacing on locating leaks is analyzed taking a single leak and multiple leaks as example. The results show that the greater the dipole spacing is, the higher the detecting sensitivity is; the smaller the dipole spacing is, the higher the detecting accuracy is. For multiple leaks, only one leak can be located when the dipole spacing is greater than the distance between the two leaks. In order to detect all leaks correctly, the dipole spacing should be smaller than the distance between the two leaks.

scholarly journals The Application of COMSOL Multiphysics in Direct Current Method Forward Modeling

2011 ◽  
Vol 3 ◽  
pp. 266-272 ◽  
Author(s):  
Xiaolong Wang ◽  
Hui Yue ◽  
Guangliang Liu ◽  
Zhao Zhao
Keyword(s):  
Direct Current ◽  
Current Method ◽  
Forward Modeling ◽  
Comsol Multiphysics

Conductivities of Room Temperature Molten Salts Containing ZnCl2, Measured by a Computerized Direct Current Method

2002 ◽  
Vol 57 (3-4) ◽  
pp. 129-135
Author(s):  
Hsin-Yi Hsu ◽  
Chao-Chen Yang
Keyword(s):  
Activation Energy ◽  
Direct Current ◽  
Molten Salts ◽  
Room Temperature ◽  
Current Method ◽  
Cross Linking ◽  
Infra Red ◽  
Different Temperatures ◽  
The Stability ◽  
Benzyltriethylammonium Chloride

The conductivities of the binary room-temperature molten salt (RTMS) systems ZnCl2-N-nbutylpyridinium chloride (BPC), ZnCl2 -1-ethyl-3-methylimidazolium chloride (EMIC) and ZnCl2 - benzyltriethylammonium chloride (BTEAC) have been measured at different temperatures and compositions by a d.c. four-probes method. The conductivities of the three RTMS are in the order ZnCl2-EMIC > ZnCl2-BPC > ZnCl2-BTEAC. In ZnCl2-BPC the conductivity at 70 to 150 °C, is maximal for 40 mol% ZnCl2. In ZnCl2 - EMIC, the conductivity below 130 °C is almost constant for 30 to 50 mol% ZnCl2 and has the lowest activation energy 25.21 kJ/mol. For these two systems, the conductivities decrease rapidly beyond 50 mol% ZnCl2 owing to the rapid increase in cross-linking and resultant tightening of the polyelectrolyte structure. As to the ZnCl2-BTEAC system, the conductivities at 110 - 150 °C decrease slowly for 30 - 60 mol% ZnCl2. The conductivities of the ZnCl2-EMICmelt are compared with those of the AlCl3-EMIC melt previously studied. The stability of the ZnCl2-EMIC melt system is explored by the effect of the environment on the conductivity and the Far Transmission Infra Red (FTIR) spectrum. It reveals that the effect is slight, and that the ZnCl2-EMIC melt may be classified as stable.

On the use of direct current in the measurement of electrolytic conductance

1935 ◽  
Vol 31 (0) ◽  
pp. 1478-1481 ◽  
Author(s):  
J. N. Brönsted ◽  
Ralph F. Nielsen
Keyword(s):  
Direct Current ◽  
Electrolytic Conductance

REACTIONS IN DISSOCIATED WATER VAPOR

1951 ◽  
Vol 29 (11) ◽  
pp. 996-1009 ◽  
Author(s):  
R. A. Jones ◽  
C. A. Winkler
Keyword(s):  
Hydrogen Peroxide ◽  
Water Vapor ◽  
Room Temperature ◽  
Reaction Chamber ◽  
Glass Wool ◽  
Cold Trap ◽  
Slight Effect ◽  
Reaction Chambers ◽  
Limiting Value ◽  
Water Hydrogen

Water vapor dissociated by an electric discharge and passed into a cold trap yielded products which gave off oxygen at temperatures above −120°C. and at room temperature consisted of hydrogen peroxide and water. With products formed under given conditions, the amount of oxygen evolved with warming was proportional to the total amount of product and independent of the warming procedure. The evolution proceeded to completion at −78°C. Water was found at all trap temperatures between −78°C. and −195°C. Hydrogen peroxide was formed only if the trap temperature was below −120°C., and oxygen was evolved only from products formed below −150°C. The yields of water, hydrogen peroxide, and evolved oxygen all increased with decreasing trap temperature. As the volume of reaction chambers inserted between the discharge tube and the trap was increased, the yield of hydrogen peroxide decreased continuously, while the yield of water at first decreased and then increased to a limiting value. Packing a given reaction chamber with glass wool drastically reduced the yield of hydrogen peroxide, but had little effect on the yield of water. Packing the trap itself had only a slight effect on the yields. The results are compared with those obtained by others with the H–O2 system at low temperatures, and a mechanism is proposed to correlate the two systems.

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